The role of a cloud service provider is to deliver on-demand computing resources, such as storage, processing power, and applications, over the internet. Providers like Amazon Web Services, Microsoft Azure, and Google Cloud offer scalable solutions that allow businesses to operate more efficiently and flexibly. They manage the underlying infrastructure, ensuring security, reliability, and compliance with regulatory standards. Cloud service providers enable organizations to focus on core operations rather than maintaining physical hardware, promoting cost efficiency, accessibility, and resource scalability in today's digital landscape.